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參數(shù)資料
| 型號(hào)： | LB11850VA |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | AC MOTOR CONTROLLER, PDSO24 |
| 封裝： | 0.225 INCH, SSOP-24 |
| 文件頁數(shù)： | 5/14頁 |
| 文件大?。?/td> | 116K |
| 代理商： | LB11850VA |
LB11850VA
No.A0609-13/14
<LIM pin>
The minimum speed is determined by the voltage of the LIM pin.
(1) Obtain the ratio of the minimum speed required to the maximum speed.
Ra = Minimum speed/maximum speed .... <1>
In the example shown in the figure above, Ra = minimum speed/maximum speed = 3000/10000 = 0.3.
(2) Obtain the product of the duty ratio at which the maximum speed is obtained and the value in equation <1>.
Ca = Duty ratio at maximum speed
×Ra .... <2>
In this example, Ca = duty ratio at maximum speed
×Ra = 0.8×0.3 = 0.24.
(3) Obtain the required LIM pin voltage.
LIM = 5-(3
×Ca) .... <3>
In this example, LIM = 5-(3
×Ca) = 5-(3×0.24) ≈ 4.3V.
(4) Divide the resistance of 5VREG, and generate the LIM voltage.
In this example, the voltage is 4.3V so the resistance ratio is 1: 6.
The resistance is 10k
between 5VREG and LIM and 62k between LIM and GND.
(RPM)
CTL Duty(%)
Maximum speed
0%
5V
100%
2V
Minimum
speed setup
CVO pin voltage (V)
2000
4000
6000
8000
10000
5VREG
VREF
CVI
SOFT
LIM
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